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ivann1987 [24]
3 years ago
15

If 25 ml of 1.50M LiOH are neutralized by 15ml of nitric acid what is the molarity of HNO3

Chemistry
2 answers:
Jobisdone [24]3 years ago
8 0
LiOH + HNO3 --> H2O + LiNO3
OH- + H+  --> H2O
OH - = 1.5M * .025L = .0375 mol
.0375mol/.04L = 0.9375M
Since it's at the equivalence point, OH- = H+ concentration

[HNO3] = 0.9375M
nasty-shy [4]3 years ago
8 0

Answer:

Ca = 2.5M

Explanation:

Volume of Acid (Va) = 15ml

Concentration of acid (Ca) = ?

Volume of base (Vb) = 25

Concentration of base (Cb) = 1.50M

The balanced chemical equation is given as;

LiOH + HNO3 --> LiNO3 + H2O

The formular relaing the parameters is given as;

(CaVa) / (CbVb) = Na/Nb

Where Na = Number of moles of Acid = 1

Nb = Number of moles of Base = 1

Making Ca subject of interest;

Ca = (Na * Cb * Vb) / (Nb * Va)

Ca = (1 * 1.50 * 25) / (1 * 15)

Ca = 37.5 / 15

Ca = 2.5M

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You decide to boil water to cook noodles. You place the pan of water on the stove
Nitella [24]

Answer:

they start bubbling and if you don't watch it the water can boil out  and evaporate into the air.

Explanation:

8 0
3 years ago
Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.
almond37 [142]

Answer:

Part A. p, n = 31, 38.

Part B. p, n = 31, 40.

Part C. ^{69}_{31}Ga,\ ^{71}_{31}Ga

Explanation:

Hello,

Part A.

In this case, since the atomic number for gallium is 31, we can say that the first isotope has also 31 protons and the neutrons are computed by using its molar mass as a whole number (69):

neutrons=mass-protons=69-31=38

Thus, result is p, n = 31, 38.

Part B.

In this case, since the atomic number for gallium is 31, we can say that the second isotopes has also 31 protons and the neutrons are computed by using its molar mass as a whole number (71):

neutrons=mass-protons=71-31=40

Thus, result is p, n = 31, 40.

Part C.

Finally, the isotopes as shown as:

^{69}_{31}Ga,\ ^{71}_{31}Ga

Best regards.

5 0
3 years ago
Draw a structure showing an aromatic resonance form. Include formal charges and lone pair electrons on the oxygen atom.
ryzh [129]

Answer:

answer is attached

Explanation:

Benzene is a common organic solvent that was previously used in gasoline; it is no longer used for this purpose, however, because it is now known to be a carcinogen. The benzene molecule (C6H6C6H6) consists of a regular hexagon of carbon atoms, each of which is also bonded to a hydrogen atom. Use resonance structures to describe the bonding in benzene.

Given: molecular formula and molecular geometry

Asked for: resonance structures

Strategy:

Draw a structure for benzene illustrating the bonded atoms. Then calculate the number of valence electrons used in this drawing.

Subtract this number from the total number of valence electrons in benzene and then locate the remaining electrons such that each atom in the structure reaches an octet.

Draw the resonance structures for benzene.

Solution:

A Each hydrogen atom contributes 1 valence electron, and each carbon atom contributes 4 valence electrons, for a total of (6 × 1) + (6 × 4) = 30 valence electrons. If we place a single bonding electron pair between each pair of carbon atoms and between each carbon and a hydrogen atom, we obtain the following:

Each carbon atom in this structure has only 6 electrons and has a formal charge of +1, but we have used only 24 of the 30 valence electrons.

B If the 6 remaining electrons are uniformly distributed pairwise on alternate carbon atoms, we obtain the following:

Three carbon atoms now have an octet configuration and a formal charge of −1, while three carbon atoms have only 6 electrons and a formal charge of +1. We can convert each lone pair to a bonding electron pair, which gives each atom an octet of electrons and a formal charge of 0, by making three C=C double bonds.

C There are, however, two ways to do this:

Each structure has alternating double and single bonds, but experimentation shows that each carbon–carbon bond in benzene is identical, with bond lengths (139.9 pm) intermediate between those typically found for a C–C single bond (154 pm) and a C=C double bond (134 pm). We can describe the bonding in benzene using the two resonance structures, but the actual electronic structure is an average of the two. The existence of multiple resonance structures for aromatic hydrocarbons like benzene is often indicated by drawing either a circle or dashed lines inside the hexagon:

7 0
3 years ago
What is the answer do this?
Travka [436]

Answer:

good luvkt,h

Explanation:jtyjty

8 0
3 years ago
Which energy stored between plates of capacitor?
Mrac [35]

Answer: Electric energy

Explanation: Electrical energy is stored between plates in electric field

3 0
3 years ago
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